Ammunition shell



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Gttorneg Oct. 17, 1950 H. c. LUFT AMMUNITION SHELL Filed Sept. 22, 1947Patented Oct. 17, 1950 UNITED STATES PATENT OFFICE-V 1 Claim.

My present invention relates to an improved ammunition shell andespecially to the method and means employed in modifying such shells asmay be lacking in the conventional end flange of the type normally usedwith firearms of foreign construction.

Many domestic shel s do not have the necessary flange extending beyondthe cylinder of the shell and it is the object of my invention to afforda simple and inexpensive method and structure for modifying such shellsand adding the flange so that such shells may be used in foreignfirearms.

In the accompanying drawings I have illustrated one complete example ofthe physical embodiment of my invention according to the best mode Ihave thus far devised, but it will be understood that various changesand alterations may be made in the exemplified structure within.

the scope of the appended claim.

In the drawings:

Fig. l is an elevational view of a shell before modification.

Fig. 2 is a longitudinal sectional view therethrough, with the annularring turned down slightly and the projectile receiving tube reduced inlength.

Fig. 3 is a sectional view of the flange ring to be added.

Fig. 4 is a sectional view through a tapered die.

Fig. 5 is an elevational View of the shell showing the shrunken ring inposition and in section.

Fig. 6 is a View of the modified shell.

Referring now to the drawings wherein I have illustrated the presentpreferred embodiment of my invention, I employ a cartridge casing havinga central cvlindrical wall 2 tapered slightly toward the pro ectilereceiving end tube 4. The head of the cartridge is closed by wall 6having an opening 8 for the detonation and the exterior of the head hasan inwardly tapering or converging face Ill terminating against theannular ring l2 of approximately the same diameter as the maximumdiameter of the wall 2.

In order to permit the use of such casings in domestic rifles using therimmed cartridge and foreign firearms, the recess must be filled and anannular flange must be rovided of greater diameter than that of thecasing.

I therefore place the shell 2 in a lathe and reduce the diameter of theannular ring [2 to receive a ring l4 having an inner flange l6 adaptedto fit into the recess of the casing, loosely.

The casing and ring is then pressed through the die l8 having taperedinner wall 26 by plunger 22 moving in guide head 24.

During its passage through the die, the ring is shrunk onto the casingtofit snugly in the.

desirable to reduce the length of the end 4 .by

cutting off a portion thereof, as shown.

By theuse of the ring and the method of applying the same, domesticcartridges may be made usablein guns requiring a rim and after the.modifying; ring is pressed and shrunk onto.

the cartridge and turned on a lathe, the casing may be charged and theprojectile located in the tube]; j

Havingthus fully described myinventionwhat I claim as new and desire tosecure by Letters Patent is: An ammunition shell having a head formedwith an annular tapered recess and an annular flange having a flatperipheral face of lesser diameter than the shell body and having a flatinner surface, and a ring on the shell having an interior tapered flangein the recess formed with a squared shoulder abutting the flat innersurface of the head flange, and an exterior annular flange of greaterdiameter than the shell casing and of substantially the same thicknessas the annular flange of the head.

HARRYC'. LUFT.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 471,129 Loveland Mar. 22, 1892815,992 Wheeler Mar. 27, 1906 1,187,464 Ofiutt June 13, 1916 1,292,359Nelson Jan. 21, 1919 1,319,185 Smith et a1 Oct. 21, 1919 2,388,094 SnellOct. 30, 1945 2,397,370 Raven Mar. 26, 1946 FOREIGN PATENTS NumberCountry Date 821,561 France Aug. 30, 1937

